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From Grant Ingersoll <gsing...@apache.org>
Subject Re: Group by in Lucene ?
Date Mon, 05 Nov 2007 12:01:23 GMT
Solr has an issue outstanding right now that implements something that  
may be close to what you want.  They are calling it Field Collapsing.   
See https://issues.apache.org/jira/browse/SOLR-236

-Grant

On Nov 5, 2007, at 12:57 AM, Marcus Herou wrote:

> Hi.
>
> I have a situation where I'm searching amongst some 100K feeds and  
> only want
> one result per site in return. I have developed a really simple  
> method of
> grouping which just scrolls through the resultset(hitset) until a  
> maxNum
> docs of feeds from a set of unique sites is populated. Since I don't  
> wanna
> reinvent the wheel, I want to know if Lucene has something like this  
> built.
> I as well will use Solr soon and then my own homecooked recipe will  
> not work
> so I really need a standard way of doing this.
>
> I know Nutch has something like it called depupField which default  
> is set to
> 2.
>
> Anyone?
>
>
> Kindly
>
> //Marcus
>
> -- 
> Marcus Herou Solution Architect & Core Java developer Tailsweep AB
> +46702561312
> marcus.herou@tailsweep.com
> http://www.tailsweep.com

--------------------------
Grant Ingersoll
http://lucene.grantingersoll.com

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